Segment, Geographic, and Market Information (Tables)

12 Months Ended

Dec. 31, 2011

Segment, Geographic, and Market Information [Abstract]

Segment disclosure

The following table sets forth certain financial information as of and for the years ended December 31, 2011, 2010 and 2009:

	2011 Restated			2010 Restated			2009 Restated
Net sales:
Minerals and materials	$	476,700		$	416,495		$	336,272
Environmental		251,907			225,544			202,511
Oilfield services		194,735			153,550			119,821
Transportation		54,113			52,225			46,642
Intersegment sales		(33,659	)		(21,537	)		(17,761	)
Total		943,796			826,277			687,485
Operating profit (loss):
Minerals and materials	$	67,144		$	53,549		$	33,693
Environmental		17,349			20,447			23,924
Oilfield services		21,226			13,654			12,261
Transportation		2,241			2,430			2,163
Corporate		(21,874	)		(21,068	)		(22,697	)
Total		86,086			69,012			49,344
Assets:
Minerals and materials	$	430,832		$	410,401		$	398,280
Environmental		159,365			160,969			150,237
Oilfield services		194,708			172,521			146,161
Transportation		3,912			3,977			3,494
Corporate		60,325			59,387			48,663
Total		849,142			807,255			746,835
Depreciation, depletion and amortization:
Minerals and materials	$	20,639		$	17,202		$	16,813
Environmental		5,389			5,352			6,219
Oilfield services		13,363			11,888			11,901
Transportation		76			46			38
Corporate		2,665			1,854			1,760
Total		42,132			36,342			36,731
Capital expenditures:
Minerals and materials	$	27,306		$	29,700		$	35,659
Environmental		8,343			2,557			2,325
Oilfield services		23,097			13,249			11,095
Transportation		198			92			39
Corporate		2,085			1,707			11,300
Total		61,029			47,305			60,418
Research and development expenses:
Minerals and materials	$	6,488		$	5,913		$	5,344
Environmental		2,311			2,284			2,339
Oilfield services		238			697			659
Corporate		42			337			315
Total		9,079			9,231			8,657

Geographic information

The following table sets forth certain geographic financial information as of and for the three years ending December 31st. EMEA includes the European, Middle East and African geographic regions. Geographic sales and operating profit are determined based on origin of the sale as opposed to destination of the sale. Inter-regional sales and operating profit are eliminated in Americas.

	2011 Restated		2010 Restated		2009 Restated
Sales to unaffiliated customers shipped from:
Americas	$	590,074	$	516,852	$	438,194
EMEA		220,100		185,591		167,482
Asia Pacific		133,622		123,834		81,809
Total		943,796		826,277		687,485
Operating profit from sales from:
Americas	$	57,534	$	45,800	$	26,742
EMEA		10,236		5,625		11,848
Asia Pacific		18,316		17,587		10,754
Total		86,086		69,012		49,344
Accounts receivable in:
Americas	$	112,325	$	105,979	$	76,598
EMEA		51,875		46,518		40,951
Asia Pacific		40,219		37,275		29,706
Total		204,419		189,772		147,255
Property, plant, equipment, and mineral rights and reserves in:
Americas	$	116,020	$	107,670	$	108,405
EMEA		108,688		114,263		92,541
Asia Pacific		48,860		49,747		47,405
Total		273,568		271,680		248,351
Identifiable assets in:
Americas	$	420,427	$	428,689	$	453,599
EMEA		289,416		265,459		211,100
Asia Pacific		139,299		113,107		82,136
Total		849,142		807,255		746,835

Net sales by product line

Net sales by product line for each fiscal year are as follows:

	2011 Restated			2010 Restated			2009 Restated
Metalcasting	$	251,546		$	196,663		$	139,949
Oilfield services		194,735			153,550			119,821
Specialty materials		105,789			107,287			98,097
Lining technologies		104,220			110,806			102,419
Building materials		80,686			58,860			55,823
Pet products		56,133			61,971			66,441
Basic minerals		55,088			49,199			27,901
Contracting services		36,027			30,968			25,426
Drilling products		31,385			26,285			22,727
Transportation		54,113			52,225			46,642
Intersegment shipping revenue		(25,926	)		(21,537	)		(17,761	)
Total		943,796			826,277			687,485

Revenue generating activities and related cost of goods sold

We generate revenues based on sales of products, provision of services and rental equipment, and shipment of goods to customers. A breakdown of each of these revenue generating activities and their related cost of goods sold for each of the past three years ending December 31 is shown in the following table.

	2011 Restated		2010 Restated		2009 Restated
Net sales by source
Net sales of tangible goods	$	709,310	$	628,839	$	522,003
Services revenues		206,299		166,750		136,601
Freight revenues		28,187		30,688		28,881
Total		943,796		826,277		687,485
Cost of sales:
Cost of tangible goods sold		512,489		461,177		383,752
Cost of services rendered		157,037		126,056		96,148
Cost associated with freight revenue		21,953		24,859		23,294
Total		691,479		612,092		503,194